Abstract: A method and apparatus for operating a laundry treating appliance that has a rotating treating chamber, which is rotatable about a rotation axis by a motor operably coupled to the rotating treating chamber, with the operation of the motor being controlled by an underdamped control scheme to determine a laundry load size.

Abstract: A method and apparatus for operating a laundry treating appliance having an underdamped control scheme for a motor to determine a laundry load size.

Abstract: A method for spinning clothes in an automatic washing machine comprises determining the size of the fabric load in the washing machine and determining a plaster speed based on the size of the fabric load. A motor gradually increases the rotational speed of the drum to the plaster speed while a balance condition monitor monitors the balanced condition of the fabric load. When the rotational speed of the drum reaches the plaster speed and the load is balanced, the motor rapidly increases the rotational speed of the drum from the plaster speed to an extraction speed. If the load becomes imbalanced at the extraction speed, the rotational speed of the drum is rapidly decreased to a redistribution speed less than the plaster speed to redistribute the load.